High Permittivity Materials

Effects of (Li0.5Nd0.5)2+ on the phase evolution, Raman spectra and microwave dielectric properties in CaO–Nd2O3–TiO2 ceramic

“…For example, CaTiO 3 ceramic were investigated by many strategies including ionic substitution (CaTi 1-x (Al 0.5 Nb 0.5 ) x O 3 [2], CaTi 1-x (Mg 0.5 W 0.5 ) x O 3 [3], Ca 1-x Nd 2x/3 TiO 3 [4], Ca 1-1.5x Sm x TiO 3 [5]), combination with other compounds (MgTiO 3 -CaTiO 3 [6], NaNbO 3 -CaTiO 3 [7], CaTiO 3 -Sm 0.9 Nd 0.1 AlO 3 [8]), doping sintering aids (CaTiO 3 -Mg 2 SiO 4 ceramic + 60ZnO-20B 2 O 3 -20SiO 2 glass [9], MgTiO 3 -CaTiO 3 + LiF [10]), etc. Other perovskite structured ceramics such as SrTiO 3 [11,12], A(B1 1/3 B2 2/3 )O 3 (A = Ba, Sr, Ca; B1 = Mg, Zn, Ni, Co, Sr, Ca, Mn, Cd; and B2 = Nb, Ta) [13][14][15][16], LnAlO 3 (Ln = Nd, Sm, La, Y) [17][18][19], M 0.5 Ln 0.5 TiO 3 (M = Li, Na, K, Ln = Nd, Sm, Pr, La) [20][21][22], have been prepared and studied about their dielectric properties and structure. However, it is hard to pursue both high ε r value and near-zero τ f value for above perovskite structured ceramics.…”